Cu(II) bromide catalyzed oxidation of aldehydes and alcohols
were purchased from Ranchem, India and purified using standard
Acknowledgments
1
13
methods. H and C spectra were recorded with a Bruker Avance
00 instrument. Chemical shifts (in ppm) were referenced to
This work was supported by the Department of Science and
Technology, New Delhi. R.D. thanks the Council of Scientific and
Industrial Research, New Delhi for a research fellowship.
4
residual solvent resonances and are reported as parts per million
relative to SiMe4. Aliquots of 0.5 ml CDCl3 were used for NMR
1
spectralmeasurements. HNMRspectrawerecollectedat400 MHz
Supporting information
using a 6000 Hz spectral width, a relaxation delay of 3.5 s, a pulse
◦
width of 38 , 30k data points and CDCl3 (7.27 ppm) as an internal
Supporting information may be found in the online version of this
article.
1
3
reference. C NMR spectra were collected at 100 MHz using a
2
5 000 Hz spectra width, a relaxation delay of 1.5 s, 75k data
◦
points, a pulse width of 40 and CDCl3 (77.23 ppm) as the internal
reference. About 8–10 mg of sample was dissolved in CDCl3 and
used for measurement. HPLC analysis was done with a Waters
HPLC instrument fitted with a Waters 515 pump and a Waters
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